Amazon.com video review: Caillou (pronounced KY-yoo) is a PBS animated series about a 4-year-old boy who's facing the challenges of growing up while gleaning an understanding of the world around him. The series features simple, colorful animation interspersed with puppetry, songs, and real children. A narrator describes Caillou's thoughts and feelings, helping kids and parents understand the motivations behind Caillou's actions. What makes the series so effective is that Caillou's actions and feelings are incredibly realistic and universal--Caillou is reality TV for young children. Caillou the Explorer contains two episodes. In the first episode, Caillou and his grandfather spend a day refurbishing an old toy boat; Gilbert, Teddy, and Rexi (puppets) explore various modes of transportation; and Caillou takes his first train trip. In the second episode, Caillou spends a day on a working farm, the puppets create some special culinary treats to share with each other, and Caillou gets his first taste of Chinese cuisine at a friend's house. These new situations inspire jealousy, awe, fear, embarrassment, and pride within Caillou. Most importantly, each experience helps Caillou grow as a person and furthers his understanding of the world. (Ages 2 to 6) --Tami Horiuchi